chore(claude): update vendored ACP runtime to 0.63.0

[jsgrrchg]

Summary

• update the vendored Claude ACP runtime from 0.62.0 to the exact upstream 0.63.0 snapshot
• update the Claude Agent SDK dependency from 0.3.219 to 0.3.220 and refresh the upstream lockfile
• update vendoring and copyright metadata with the new version and upstream commit
• keep Comando client capabilities unchanged; subagent-transcript remains disabled

Validation

• npm ci
• npm run build
• npm test -- --run (684 passed, 20 skipped)
• npm run lint
• node scripts/ai/stage-claude-runtime.mjs
• pnpm run verify:ai-runtimes
• pnpm run native:protocol:check
• pnpm run typecheck
• verified the vendored directory matches upstream commit 15979bba7907484ee22111cdc33b79b0bdcd452d

Security note

The current npm audit warning for @hono/node-server is caused by advisory metadata that does not account for the 1.x backport. The locked 1.19.17 release already contains the fix introduced in 1.19.15, so no local dependency override was added.

Closes #188